@import url('https://fonts.googleapis.com/css2?family=Fraunces:ital,wght@0,500;0,600;0,700;1,500&family=Source+Sans+3:wght@400;500;600;700&display=swap');

/* ========================================================
   RESET
======================================================== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
img, svg { display: block; max-width: 100%; }
button, input { font: inherit; color: inherit; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ========================================================
   ROOT / DESIGN TOKENS
======================================================== */
:root {
  --color-primary: #10294d;
  --color-primary-dark: #091830;
  --color-accent: #1f7a5c;
  --color-gold: #c89b3c;
  --color-bg: #f7f5ef;
  --color-surface: #ffffff;
  --color-border: #ddd8c9;
  --color-text: #1b2432;
  --color-text-muted: #5a6475;

  --font-display: 'Fraunces', serif;
  --font-body: 'Source Sans 3', sans-serif;

  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;

  --shadow-sm: 0 1px 3px rgba(16, 41, 77, 0.08);
  --shadow-md: 0 6px 18px rgba(16, 41, 77, 0.12);
  --shadow-lg: 0 16px 40px rgba(16, 41, 77, 0.18);

  --transition: 0.25s ease;
}

body {
  font-family: var(--font-body);
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  color: var(--color-primary);
  line-height: 1.2;
  font-weight: 600;
}

h1 { font-size: clamp(2rem, 4vw + 1rem, 3.2rem); }
h2 { font-size: clamp(1.6rem, 2.5vw + 1rem, 2.4rem); }
h3 { font-size: clamp(1.15rem, 1.2vw + 1rem, 1.5rem); }

p { color: var(--color-text); }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

.visually-hidden {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--color-primary);
  color: #fff;
  padding: 0.75rem 1.25rem;
  z-index: 2000;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus {
  left: 0;
}

/* ========================================================
   ANIMATIONS
======================================================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(16px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* ========================================================
   HEADER
======================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 500;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  box-shadow: var(--shadow-sm);
}

.header-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.site-name {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--color-primary);
  padding: 0.25rem 0.5rem;
  border-radius: var(--radius-sm);
  border: 1px dashed transparent;
  cursor: text;
}
.site-name:focus {
  outline: none;
  border-color: var(--color-gold);
  background: #fcf7ea;
}

.main-nav ul {
  display: flex;
  gap: 1.75rem;
  flex-wrap: wrap;
}

.main-nav a {
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--color-text);
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}
.main-nav a::after {
  content: '';
  position: absolute;
  left: 0; bottom: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width var(--transition);
}
.main-nav a:hover {
  color: var(--color-accent);
}
.main-nav a:hover::after {
  width: 100%;
}

/* ========================================================
   BUTTONS
======================================================== */
.btn-primary, .btn-secondary {
  display: inline-block;
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 1.05rem;
  padding: 0.9rem 2rem;
  border-radius: var(--radius-md);
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform var(--transition), background var(--transition), box-shadow var(--transition), color var(--transition);
  text-align: center;
}

.btn-primary {
  background: var(--color-accent);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: #166349;
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  transform: scale(0.97);
}
.btn-primary:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-secondary:hover {
  background: var(--color-primary);
  color: #fff;
}
.btn-secondary:active {
  transform: scale(0.97);
}
.btn-secondary:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none !important;
}

/* ========================================================
   HERO
======================================================== */
.hero {
  background: linear-gradient(160deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
  color: #fff;
  padding: clamp(3.5rem, 6vw, 6rem) 1.5rem;
  text-align: center;
}

.hero-content {
  max-width: 760px;
  margin: 0 auto;
  animation: fadeUp 0.7s ease both;
}

.hero h1 {
  color: #fff;
}

.hero-subtitle {
  margin-top: 1.25rem;
  font-size: clamp(1.05rem, 1.2vw + 0.8rem, 1.3rem);
  color: #e4e9f1;
}

.hero-extra {
  margin-top: 1rem;
  font-size: 1rem;
  color: var(--color-gold);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.hero .btn-primary {
  margin-top: 2rem;
}

.hero-note {
  margin-top: 1rem;
  font-size: 0.9rem;
  color: #c6ccd9;
}

/* ========================================================
   HOW IT WORKS
======================================================== */
.how-it-works {
  padding: clamp(3rem, 5vw, 5rem) 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.how-it-works h2 {
  margin-bottom: 2.5rem;
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.75rem;
}

.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 2.25rem 1.5rem;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: fadeUp 0.6s ease both;
}
.step-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.step-number {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 48px;
  height: 48px;
  margin: 0 auto 1rem;
  border-radius: 50%;
  background: var(--color-accent);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
}

.step-card h3 { margin-bottom: 0.5rem; }
.step-card p { color: var(--color-text-muted); font-size: 0.95rem; }

/* ========================================================
   QUIZ SECTION
======================================================== */
.quiz-section {
  padding: clamp(3rem, 5vw, 5rem) 1.5rem;
  background: #eef0e6;
}

.quiz-panel {
  max-width: 760px;
  margin: 0 auto;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: clamp(1.75rem, 3vw, 3rem);
  animation: fadeUp 0.5s ease both;
}

#quiz-intro-panel {
  text-align: center;
}
#quiz-intro-panel p {
  color: var(--color-text-muted);
  margin: 1rem 0 1.75rem;
  font-size: 1.05rem;
}

.quiz-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
  font-weight: 700;
  color: var(--color-primary);
}

#quiz-score-label {
  color: var(--color-gold);
  background: #fbf4e2;
  padding: 0.35rem 0.85rem;
  border-radius: var(--radius-sm);
}

progress {
  appearance: none;
  -webkit-appearance: none;
  width: 100%;
  height: 12px;
  border: none;
  border-radius: 999px;
  overflow: hidden;
  margin-bottom: 2rem;
  background: var(--color-border);
}
progress::-webkit-progress-bar {
  background: var(--color-border);
  border-radius: 999px;
}
progress::-webkit-progress-value {
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  border-radius: 999px;
  transition: width 0.4s ease;
}
progress::-moz-progress-bar {
  background: linear-gradient(90deg, var(--color-accent), var(--color-gold));
  border-radius: 999px;
  transition: width 0.4s ease;
}

.question-card {
  animation: fadeIn 0.4s ease both;
}

.question-context {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  font-style: italic;
  margin-bottom: 0.75rem;
}

.question-text {
  margin-bottom: 1.75rem;
  color: var(--color-primary);
}

.answer-options {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
  margin-bottom: 1rem;
}

.option-btn {
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  color: var(--color-text);
  cursor: pointer;
  transition: border-color var(--transition), background var(--transition), transform var(--transition), box-shadow var(--transition);
}
.option-btn:hover:not(:disabled) {
  border-color: var(--color-accent);
  background: #f0f7f3;
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}
.option-btn:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}
.option-btn:disabled {
  cursor: not-allowed;
}
.option-btn.correct {
  background: #e3f3ea;
  border-color: var(--color-accent);
  color: #114a35;
  opacity: 1;
}
.option-btn.incorrect {
  background: #fbe9e7;
  border-color: #c0392b;
  color: #7c1f14;
  opacity: 1;
}

.answer-feedback {
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px dashed var(--color-border);
  animation: fadeUp 0.4s ease both;
}

.feedback-result {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--color-accent);
  margin-bottom: 0.5rem;
}

.feedback-correct-answer {
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 1rem;
}

.feedback-explanation {
  background: #fbf4e2;
  border-left: 4px solid var(--color-gold);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
}
.feedback-explanation strong {
  display: block;
  margin-bottom: 0.35rem;
  color: var(--color-primary);
  font-family: var(--font-display);
}

/* ========================================================
   RESULTS PANEL
======================================================== */
.results-panel {
  text-align: center;
}

.results-score {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 2vw + 1rem, 2rem);
  color: var(--color-gold);
  margin: 1rem 0;
  font-weight: 700;
}

.results-level {
  font-size: 1.1rem;
  color: var(--color-primary);
  font-weight: 600;
  margin-bottom: 1rem;
}

.results-disclaimer {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  margin-bottom: 2rem;
}

.results-panel .btn-secondary,
.results-panel .btn-primary {
  margin: 0.5rem;
}

/* ========================================================
   LEAD FORM
======================================================== */
.lead-section {
  padding: clamp(3rem, 5vw, 5rem) 1.5rem;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.lead-text {
  color: var(--color-text-muted);
  margin: 0.75rem 0 2rem;
  font-size: 1.05rem;
}

#lead-form {
  text-align: left;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: clamp(1.5rem, 3vw, 2.5rem);
  box-shadow: var(--shadow-sm);
}

.form-field {
  margin-bottom: 1.5rem;
  display: flex;
  flex-direction: column;
}

.form-field label {
  font-weight: 600;
  margin-bottom: 0.4rem;
  color: var(--color-primary);
}

.form-field input[type="text"],
.form-field input[type="email"],
.form-field input[type="tel"] {
  padding: 0.85rem 1rem;
  border: 2px solid var(--color-border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form-field input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px rgba(31, 122, 92, 0.18);
}
.form-field input[aria-invalid="true"] {
  border-color: #c0392b;
}

.form-checkbox {
  flex-direction: row;
  align-items: flex-start;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.form-checkbox label {
  font-weight: 500;
  color: var(--color-text);
  margin: 0;
  flex: 1;
}
.form-checkbox input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border: 2px solid var(--color-border);
  border-radius: 5px;
  flex-shrink: 0;
  cursor: pointer;
  position: relative;
  transition: border-color var(--transition), background var(--transition);
}
.form-checkbox input[type="checkbox"]:checked {
  background: var(--color-accent);
  border-color: var(--color-accent);
}
.form-checkbox input[type="checkbox"]:checked::after {
  content: '✓';
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -55%);
  color: #fff;
  font-size: 0.85rem;
  font-weight: 700;
}
.form-checkbox input[type="checkbox"]:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

.field-error {
  display: block;
  color: #c0392b;
  font-size: 0.85rem;
  margin-top: 0.4rem;
  min-height: 1.1em;
}

#lead-form .btn-primary {
  width: 100%;
  margin-top: 0.5rem;
}

.form-message {
  margin-top: 1.25rem;
  background: #e3f3ea;
  border: 1px solid var(--color-accent);
  color: #114a35;
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  font-weight: 600;
}

/* ========================================================
   LEARN SECTION
======================================================== */
.learn-section {
  padding: clamp(3rem, 5vw, 5rem) 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  text-align: center;
}

.learn-section h2 {
  margin-bottom: 2.5rem;
}

.learn-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
}

.learn-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-top: 4px solid var(--color-accent);
  border-radius: var(--radius-md);
  padding: 2rem 1.5rem;
  text-align: left;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition), box-shadow var(--transition);
}
.learn-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.learn-card h3 { margin-bottom: 0.65rem; }
.learn-card p { color: var(--color-text-muted); font-size: 0.95rem; }

/* ========================================================
   FAQ
======================================================== */
.faq-section {
  padding: clamp(3rem, 5vw, 5rem) 1.5rem;
  max-width: 800px;
  margin: 0 auto;
}

.faq-section h2 {
  text-align: center;
  margin-bottom: 2rem;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-question {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  padding: 1.25rem 0.25rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: color var(--transition);
}
.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--color-accent);
  transition: transform var(--transition);
  margin-left: 1rem;
}
.faq-question[aria-expanded="true"]::after {
  transform: rotate(45deg);
}
.faq-question:hover {
  color: var(--color-accent);
}
.faq-question:focus-visible {
  outline: 3px solid var(--color-gold);
  outline-offset: 2px;
}

.faq-answer {
  padding: 0 0.25rem 1.25rem;
  color: var(--color-text-muted);
  animation: fadeIn 0.3s ease both;
}

/* ========================================================
   FOOTER
======================================================== */
.site-footer {
  background: var(--color-primary-dark);
  color: #cfd6e2;
  padding: 3rem 1.5rem 1.5rem;
}

.footer-content {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 2rem;
  padding-bottom: 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.12);
}

.footer-column p, .footer-column a {
  color: #cfd6e2;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
}
.footer-column a:hover {
  color: var(--color-gold);
  text-decoration: underline;
}

.footer-site-name {
  color: #fff;
  margin-bottom: 0.75rem;
  font-size: 1.3rem;
}

.footer-links ul {
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
}
.footer-links a {
  font-size: 0.9rem;
}

.footer-disclaimer {
  max-width: 1200px;
  margin: 1.5rem auto 0.75rem;
  font-size: 0.8rem;
  color: #9aa4b8;
  line-height: 1.6;
}

.footer-copy {
  max-width: 1200px;
  margin: 0 auto;
  font-size: 0.8rem;
  color: #7e889e;
}

/* ========================================================
   COOKIE BANNER
======================================================== */
.cookie-banner {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: var(--color-surface);
  backdrop-filter: blur(10px);
  border-top: 1px solid var(--color-border);
  box-shadow: var(--shadow-lg);
  padding: 1rem 2rem;
  display: none;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
  z-index: 1000;
  flex-wrap: wrap;
}
.cookie-banner p {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  flex: 1;
  min-width: 220px;
}
.cookie-banner a {
  color: var(--color-accent);
  text-decoration: underline;
}
.cookie-actions {
  display: flex;
  gap: 0.75rem;
}
.cookie-actions .btn-primary,
.cookie-actions .btn-secondary {
  padding: 0.6rem 1.25rem;
  font-size: 0.9rem;
}

/* ========================================================
   RESPONSIVE
======================================================== */
@media (max-width: 1024px) {
  .steps-list { grid-template-columns: repeat(3, 1fr); gap: 1.25rem; }
  .learn-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-content { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .header-inner { flex-direction: column; align-items: flex-start; gap: 0.75rem; }
  .main-nav ul { gap: 1rem; flex-wrap: wrap; }
  .steps-list { grid-template-columns: 1fr; }
  .answer-options { grid-template-columns: 1fr; }
  .learn-grid { grid-template-columns: 1fr; }
  .quiz-meta { flex-direction: column; align-items: flex-start; }
  .cookie-banner { flex-direction: column; text-align: center; padding: 1rem; }
}

@media (max-width: 480px) {
  .hero { padding: 2.5rem 1.25rem; }
  .quiz-panel { padding: 1.25rem; }
  .btn-primary, .btn-secondary { width: 100%; }
  .results-panel .btn-primary, .results-panel .btn-secondary { width: auto; }
  .step-card, .learn-card { padding: 1.5rem 1.25rem; }
}

/* --- gap-fill pass: previously unstyled selectors --- */
/* ========================================================
   ADDITIONAL SELECTOR STYLING
======================================================== */

#main-content {
  display: block;
}

#inicio,
#como-funciona,
#quiz-section,
#lead-section,
#aprende,
#faq {
  scroll-margin-top: 90px;
}

#site-name {
  display: inline-block;
}

#hero-heading {
  margin: 0;
}

#hero-start-btn,
#intro-start-btn {
  animation: fadeUp 0.5s ease both;
}

#how-heading,
#quiz-heading,
#lead-heading,
#learn-heading,
#faq-heading {
  text-wrap: balance;
}

#quiz-play-panel,
#quiz-results-panel {
  width: 100%;
}

#quiz-progress-label {
  font-size: 0.95rem;
}

#quiz-progress-bar {
  display: block;
}

#question-card {
  display: block;
}

#question-context {
  display: block;
}

#question-text {
  display: block;
}

#answer-options {
  width: 100%;
}

#answer-feedback {
  display: block;
}

#feedback-result {
  display: block;
}

#feedback-correct-answer {
  display: block;
}

#explanation-text {
  color: var(--color-text);
  font-size: 0.98rem;
}

#next-question-btn {
  display: inline-block;
}

#results-score {
  display: block;
}

#results-level {
  display: block;
}

.results-cta {
  display: inline-block;
}

#lead-section {
  scroll-margin-top: 90px;
}

#nombre,
#apellidos,
#email,
#telefono {
  width: 100%;
}

#error-nombre,
#error-apellidos,
#error-email,
#error-telefono,
#error-privacidad {
  display: block;
}

#privacidad {
  margin-top: 0.15rem;
}

#form-message {
  display: block;
}

.faq-list {
  display: flex;
  flex-direction: column;
}

#faq-q1,
#faq-q2,
#faq-q3,
#faq-q4,
#faq-q5 {
  width: 100%;
}

#faq-a1,
#faq-a2,
#faq-a3,
#faq-a4,
#faq-a5 {
  display: block;
}

#cookie-banner {
  display: none;
}

#accept-cookies,
#decline-cookies {
  white-space: nowrap;
}

.quiz-start-trigger {
  display: inline-block;
}